Space saving on peripheral rim outside display pixel region in display device

• US 20050225544A1
• Filed: 04/11/2005
• Published: 10/13/2005
• Est. Priority Date: 04/12/2004
• Status: Active Grant

• Current Assignee: Vista Peak Ventures LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: NEC Corporation
• Inventors: Ishibashi, Osamu
• Granted Patent: US 7,483,109 B2
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels

Abstract

The display device of the present invention has a scan line driver element formed on a dielectric substrate and provided with a scan line driver circuit made up of thin film transistors. The scan line driver element is mounted on the region along one side of the display panel outside the display pixel region. Further, signal line driver element provided with a signal line driver circuit made up of mono crystal silicon transistors are mounted on the region along another side adjoining the one side of the display panel outside the display pixel region.

Claims

1. A display device comprising

a quadrangular display panel having a plurality of display pixels arrayed in a matrix, and a plurality of scan lines and a plurality of signal lines each adapted to select the plurality of the display pixels,

a scan line driver element, having a scan line driver circuit formed on a dielectric substrate and made up of thin film transistors and adapted to receive signals and a power supply voltage from an external circuit and supply said power supply voltage to said scan lines in response to the supplied signals, wherein said scan line driver element is mounted on a peripheral rim along one side of said display panel outside the display pixel region,

a signal line driver element, having a signal line driver circuit made up of mono crystal silicon transistors and adapted to receive signals and a power supply voltage from said external circuit and supply said power supply voltage to said signal lines in response to the supplied signals, wherein said signal line driver element is mounted on the peripheral rim along another side adjoining said one side of said display panel outside the display pixel region in an arrangement in which said signal line driver element is mounted on a film substrate, and

FPC cable in which wirings are formed to supply said signals and power supply voltage from said external circuit to said scan line driver element and said display panel and adapted to supply signals and the power supply voltage to said scan line driver element and said display panel through said wirings.

2. A display device according to claim 1, wherein said dielectric substrate is a glass substrate.

3. A display device according to claim 1, wherein said film substrate has wirings formed to supply said signals and power supply voltage from said external circuit to said scan line driver element and said display panel, and wherein said signals and power supply voltage are supplied to said scan line driver element and said display panel through the wirings formed on said film substrate in place of said FPC cable.

4. A display device according to claim 1, wherein said signal line driver element is mounted on the peripheral rim along said another side of said display panel outside said display pixel region directly without interposing said film substrate, and

said FPC cable has wirings additionally formed for supplying signals and a power supply voltage from said external circuit to said signal line driver element and supplies said signals and power supply voltage to said signal line driver element through said additionally formed wirings.

5. A display device according to claim 4, wherein said FPC cable is provided in the corner region bounded by said scan line driver element and said signal line driver element.

6. A display device according to claim 1, wherein said display panel is provided with a quadrangular first glass substrate on which said display pixels, said scan lines and said signal lines are formed and also a quadrangular second glass substrate opposite to said first glass substrate across the liquid crystal layer and having opposed electrodes formed thereon, and

said first glass substrate is larger in both length and width than said second glass substrate, with an area covered with said second glass substrate serving for said display pixel region and also an area outside the area covered with said second glass substrate defined as said peripheral rim.